It may mean D. Sc. (Doctor of Science) as given in the wikipedia entry: "Doctor of Science (Latin: Scientiæ Doctor), usually abbreviated Sc.D., D.Sc., S.D. or Dr.Sc ...an academic research degree awarded in a number of countries throughout the world." en.wikipedia.org/wiki/DSc "the Sc.D. is a 'higher doctorate' awarded in recognition of a substantial and sustained contribution to scientific knowledge." If the entity has Dr. before his/her name, we might see Sc. after, as well as M.D.
Greenbelt, MD
The distance from Baltimore, MD to Myrtle Beach, SC is about 487.2 miles (according to the shortest route on Mapquest).
448 miles
524 miles
Baltimore, MD
Timmonsville, SC
Kenly, NC
Gable, SC
Butner, NC
Spartanburg, SC
James Crossroads, SC
Lake Marion in Santee, SC